Tit for tat works great, but only if you are making allowances for being wrong. There was a study of prisoner's dilemma, a kind of market simulation where every interaction was geared toward a high probability of market failure. Tit for tat but with forgiveness is the strategy that bested every other. It's cooperatikn but with retaliatory justice in response to information about the other actor behaving badly, and the forgiveness is the allowance for that information to possibly not be indicative of how the other actor will always behave, thus returning back to copperation.